// see http://vuejs-templates.github.io/webpack for documentation.
var path = require('path')
var argv = require('yargs').argv
// yargs用来给node执行时增加一个参数，argv应该是参数数组
// 我们不输入参数的时候就是[]

// 编译参数
var params = {
  APP_CODE: 'cs',
  ENV: 'prod',
  DIST_PATH: path.resolve(__dirname, '../dist')
}
// 参数处理
var paramProcess = {
  APP_CODE(str) {
    return str
  },
  // 输出路径
  DIST_PATH(str) {
    if (str === '.') {
      str = path.resolve(__dirname, str)
    } else {
      str = path.resolve(str)
    }
    return str
  },
  // 执行环境
  ENV(str) {
    return str
  }
}

if (argv._) {
  argv._.forEach((str) => {
    for (let code in paramProcess) {
      if (str.indexOf(code + '=') === 0) {
        params[code] = paramProcess[code](str.replace(code + '=', ''))
      }
    }
  })
}
module.exports = {
  build: {
    params,
    env: require('./prod.env'),
    index: params.DIST_PATH + '/index.html',
    login: params.DIST_PATH + '/login.html',
    assetsRoot: params.DIST_PATH,
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',
    productionSourceMap: true,
    // Gzip off by default as many popular static hosts such as
    // Surge or Netlify already gzip all static assets for you.
    // Before setting to `true`, make sure to:
    // npm install --save-dev compression-webpack-plugin
    productionGzip: false,
    productionGzipExtensions: ['js', 'css'],
    // Run the build command with an extra argument to
    // View the bundle analyzer report after build finishes:
    // `npm run build --report`
    // Set to `true` or `false` to always turn it on or off
    bundleAnalyzerReport: process.env.npm_config_report
  },
  dev: {
    env: require('./dev.env'),
    port: 8080,
    autoOpenBrowser: true,
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',
    proxyTable: {},
    // CSS Sourcemaps off by default because relative paths are "buggy"
    // with this option, according to the CSS-Loader README
    // (https://github.com/webpack/css-loader#sourcemaps)
    // In our experience, they generally work as expected,
    // just be aware of this issue when enabling this option.
    cssSourceMap: false
  }
}
